Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36469ccf6c19d64…

MALICIOUS

PDF

88.5 KB Created: 2021-04-25 04:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ee8a5b35cc6b6be291e65fd722457c82 SHA-1: 70467e5859c26ce546422878055a291343c7daac SHA-256: c36469ccf6c19d64f739df22e07c1a6711fd391873ff399c62f3f8e8cb57e008
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/strik?utm_term=what+is+the+meaning+of+lcm+in+maths PDF link annotation
    • http://lnstagramsupportinfo.com/what_are_the_properties_of_pure_substances_answerq6v6f.pdfIn PDF document text
    • http://grizhoff.ru/denatidujogutivyb9u.pdfIn PDF document text
    • http://instasavephoto.com/backpack_literature_5th_edition_freeczssp.pdfIn PDF document text
    • http://xejevojesinil.22web.org/famewumopuxagajisido.pdfIn PDF document text
    • http://italysummer.space/consumer_behaviour_meaning5vw97.pdfIn PDF document text
    • http://idealica-italiauficiale.website/new_action_movies_hdul900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c4881f-217f-44e5-81e4-131d3f6b227c/thinking_and_destiny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ebebd5-0fec-42ca-a605-e6668efc577b/schlage_keypad_deadbolt_just_spins.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/23155625096.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/les_miserables_songs_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/rabutodowinanixiguxap.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/computerized_accounting_in_karachi.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/kekuz.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/product_inventory_management_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456f673a-8915-4769-a775-c16bb521e034/40071835739.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_642b798e454741e29d7c2115bc5c7c1b.pdf?index=trueIn PDF document text
    • http://padijajuvon.rf.gd/85344956364.pdfIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_8c41c07776c44fc6a0f40c17bde828ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/halloween_pumpkin_powerpoint_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e08282b-7b5e-4e81-8275-3be2b1d8b39f/86530290871.pdfIn PDF document text
    • http://patalenix.epizy.com/vemizobona.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/75028595845.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 5212 bytes
SHA-256: e2994bf3ace0dd6ea307305c6e181a1e0fb830ebba811c919171a5a580a76503
font_01_sfnt_off00012ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE3 11032 bytes
SHA-256: b1bab6a25815a6a3c430ef53db33d45f6927e9d34a968b59e109298899099297

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